Callidus once again performed a successful cryogenic test on a 4” Gate Valve. Whilst not a common test method, cryogenic testing is being conducted more frequently in the Callidus workshop.
Valves today face more challenging conditions from a wider range of applications. As a result, Callidus clients are asking for more and better testing. Some valves need to be successfully tested at more extreme temperatures and more extreme pressures. Such tests call for specialized equipment and test procedures.
The most common of these more extreme tests is cryogenic testing. Such testing is generally performed at -196° C, which is the temperature of liquid nitrogen (LN). Standard practice is for the valve to be immersed in the LN up to the packing gland area. The packing must be kept out of the LN or it could freeze the packing, seizing the stem and causing the valve to lock up and fail to operate. Because polymer seals do not function well at cryogenic temperatures, valve end connections must be the type that makes a solid mechanical connection.
Callidus cryogenic testing is in line with all internationally recognised test standards and performed with utmost professionalism to ensure efficiency and safety are maintained at all times.